Obstacle discrimination device and obstacle discrimination method
First Claim
1. An obstacle discrimination device for discriminating among a pedestrian, a lightweight obstacle lighter than the pedestrian and a heavyweight obstacle heavier than the pedestrian in a collision of a vehicle, the obstacle discrimination device comprising:
- a first detection unit;
a second detection unit which is more resistant to an impact due to the collision than the first detection unit, whereinthe first detection unit is mounted at a low-stiffness member of the vehicle, the low-stiffness member being readily deformed to buffer the impact in the collision,the second detection unit is mounted at a high-stiffness member of the vehicle, the high-stiffness member being more resistant to a deformation than the low-stiffness member, andthe high-stiffness member includes two front side members of the vehicle; and
an obstacle discrimination ECU performing at least one of a discrimination for determining whether or not an obstacle colliding with the vehicle is the lightweight obstacle and a discrimination for determining whether or not the obstacle is the heavyweight obstacle based on detection signals of the first detection unit, andperforming the discrimination for determining whether or not the obstacle is the heavyweight obstacle based on detection signals of the second detection unit, the obstacle discrimination ECU sending instructions corresponding to discrimination results to a pedestrian protection device of the vehicle, whereinthe obstacle discrimination ECU determines that the obstacle colliding with the vehicle is the heavyweight obstacle when an output value of the second detection unit is larger than a first threshold value, and does not activate a passenger protection airbag when the output value of the second detection unit is larger than the first threshold value but is smaller than a second threshold value that is larger than the first threshold value, andthe obstacle discrimination ECU activates the passenger protection airbag to be deployed when the output value of the second detection unit is larger than the second threshold value.
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Abstract
An obstacle discrimination device has a first detection unit, a second detection unit which is more resistant to damage than the first detection unit, and an obstacle discrimination ECU. The obstacle discrimination ECU performs at least one of a discrimination for determining whether or not an obstacle colliding with a vehicle is a lightweight obstacle and a discrimination for determining whether or not the obstacle is a heavyweight obstacle based on detection signals of the first detection unit, and performs a discrimination for determining whether or not the obstacle is the heavyweight obstacle based on detection signals of the second detection unit. The obstacle discrimination ECU sends instructions corresponding to discrimination results to a pedestrian protection device and the like of the vehicle.
23 Citations
23 Claims
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1. An obstacle discrimination device for discriminating among a pedestrian, a lightweight obstacle lighter than the pedestrian and a heavyweight obstacle heavier than the pedestrian in a collision of a vehicle, the obstacle discrimination device comprising:
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a first detection unit; a second detection unit which is more resistant to an impact due to the collision than the first detection unit, wherein the first detection unit is mounted at a low-stiffness member of the vehicle, the low-stiffness member being readily deformed to buffer the impact in the collision, the second detection unit is mounted at a high-stiffness member of the vehicle, the high-stiffness member being more resistant to a deformation than the low-stiffness member, and the high-stiffness member includes two front side members of the vehicle; and an obstacle discrimination ECU performing at least one of a discrimination for determining whether or not an obstacle colliding with the vehicle is the lightweight obstacle and a discrimination for determining whether or not the obstacle is the heavyweight obstacle based on detection signals of the first detection unit, and performing the discrimination for determining whether or not the obstacle is the heavyweight obstacle based on detection signals of the second detection unit, the obstacle discrimination ECU sending instructions corresponding to discrimination results to a pedestrian protection device of the vehicle, wherein the obstacle discrimination ECU determines that the obstacle colliding with the vehicle is the heavyweight obstacle when an output value of the second detection unit is larger than a first threshold value, and does not activate a passenger protection airbag when the output value of the second detection unit is larger than the first threshold value but is smaller than a second threshold value that is larger than the first threshold value, and the obstacle discrimination ECU activates the passenger protection airbag to be deployed when the output value of the second detection unit is larger than the second threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 20, 21, 22)
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16. An obstacle discrimination method for discriminating among a pedestrian, a lightweight obstacle lighter than the pedestrian and a heavyweight obstacle heavier than the pedestrian in a collision of a vehicle, the obstacle discrimination method comprising:
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a light-collision discrimination step for determining whether or not an obstacle colliding with the vehicle is the lightweight obstacle based on detection signals of a first detection unit; and a heavy-collision discrimination step for determining whether or not the obstacle is the heavyweight obstacle based on the detection signals of the first detection unit and detection signals of a second detection unit, wherein the first detection unit is mounted at a tow-stiffness member of the vehicle, the low-stiffness member being readily deformed to buffer an impact in the collision, the second detection unit is mounted at a high-stiffness member of the vehicle, the high-stiffness member being more resistant to a deformation than the low-stiffness member, and the high-stiffness member is a front side member of the vehicle, and further wherein the heavy-collision discrimination step includes determining that the obstacle is a heavyweight obstacle when the detection signal of the second detection unit is larger than a first threshold, and not activating a passenger protection airbag when the detection signal of the second detection unit is larger than the first threshold but is smaller than a second threshold that is larger than the first threshold, and activating the passenger protection airbag to be deployed when the detection signal of the second detection unit is larger than the second threshold. - View Dependent Claims (17)
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18. An obstacle discrimination device for discriminating among a pedestrian, a lightweight obstacle lighter than the pedestrian, and a heavyweight obstacle heavier than the pedestrian in a collision of a vehicle, the obstacle discrimination device comprising:
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a first detection unit; a second detection unit which is more resistant to an impact due to the collision than the first detection unit; and an obstacle discrimination ECU performing a first discrimination for determining whether an or not an obstacle colliding with the vehicle is the lightweight obstacle based on a detection signal of the first detection unit, a second discrimination for determining whether the obstacle is the pedestrian based on a detection signal from the first detection unit and a detection signal from the second detection unit, and a third discrimination for determining whether the obstacle is the heavyweight obstacle based on a detection signal from the second detection unit, wherein the first discrimination results in a determination that an obstacle colliding with the vehicle is a lightweight obstacle when the detection signal of the first detection unit is less than a first detection unit threshold value, and the second discrimination results in a determination that the obstacle colliding with the vehicle is a pedestrian when the detection signal of the first detection unit is greater than or equal to the first detection unit threshold value and the detection signal of the section detection unit is less than a first threshold value of the second detection unit, and the third discrimination results in a determination that an obstacle colliding with the vehicle is a heavyweight obstacle when the detection signal of the second detection unit is greater than the first threshold value of the second detection unit. - View Dependent Claims (19, 23)
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Specification